diff --git a/libsrc/atari/cashdr.s b/libsrc/atari/cashdr.s
index d4824f816..c00ee98c2 100644
--- a/libsrc/atari/cashdr.s
+++ b/libsrc/atari/cashdr.s
@@ -31,7 +31,7 @@ _cas_hdr:
         ldy     #80
         sta     (SAVMSC),y
 .endif
-        lda     #$3c
+        lda     #$3c                    ; motor off
         sta     PACTL
         clc
         rts